Render template from twig extension

Question

I have built a twig extension to do some things and one of them is render a template. How can I access from inside the twig extension the engine environment and call the Render

Answer 1

@tvlooy answer give me a hint but didn't work for me. What I needed to to to achieve it is:

namespace AppBundle\Twig;


class MenuExtension extends \Twig_Extension
{
    public function getName()
    {
        return 'menu_extension';
    }

    public function getFunctions()
    {
       return [
           new \Twig_SimpleFunction('myMenu', [$this, 'myMenu'], [
               'needs_environment' => true,
               'is_safe' => ['html']
           ])
       ];
    }

    public function myMenu(\Twig_Environment $environment)
    {
          return $environment->render('AppBundle:Menu:main-menu.html.twig');
    }
}

I needed addtionaly add 'is_safe' => ['html'] to avoid autoescaping of HTML.

I've also registered the class as symfony service:

app.twig.menu_extension:
    class: AppBundle\Twig\MenuExtension
    public: false
    tags:
      - { name: twig.extension }

in TWIG template I've added {{ myMenu() }}

I work with "twig/twig": "~1.10"and Symfony 3.1.3 version